. Echinoidea. Sea urchins. Ingolf Expeditionen IV. 2. Tit. Mortensen. Echinoidea II. Tab. Th. Bloch et Pacht & Crone fol. Wicht & Crone phototyp. Brissopsis lyrifera (Forb.), elongata n. Brissopsis sp. Hemiaster expergitus Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mortensen, Th. (Theodor), 1868-1952. Copenhagen, Printed by Bianco Luno

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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1900, bookyear1903